Ventilatory and heart rate chemosensitivity in track-and-field athletes.
Fifty-four male track-and-field athletes and 18 male non-athletes were examined by isocapnic progressive hypoxia and CO2 rebreathing tests. Ventilatory and heart rate (HR) responses to hypoxia were analysed by a hyperbolic relationship and the ventilatory response to hypercapnia by a linear regression. The results showed that ventilatory sensitivity during hypoxia was significantly attenuated in the long-distance runners and sprinters compared to the non-athletes. Although heart rate sensitivity during hypoxia in none of the athletes showed a significant difference compared to that of the non-athletes, baseline HR in the long-distance runners was significantly lower than that of the non-athletes. None of the athletes showed significant differences in ventilatory sensitivity during hypercapnia compared to the non-athletes.
Ohyabu
Y
Y
Faculty of General Arts, Kogakuin University, Tokyo, Japan.
Usami
A
A
Ohyabu
I
I
Ishida
Y
Y
Miyagawa
C
C
Arai
T
T
Honda
Y
Y
D000293:Adolescent; D000328:Adult; D002628:Chemoreceptor Cells / Q000502:physiology*; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D000860:Hypoxia / Q000503:physiopathology*; D008297:Male; D010806:Physical Education and Training; D012119:Respiration / Q000502:physiology*; D012420:Running; D013177:Sports